In Person: Election Day. (You must show proof of residence to register at the polls on Election Day.)
By Mail: 25 days before Election Day.
Online: 25 days before Election Day.
If you have missed the voter registration deadline, you can still register to vote and a cast a ballot at the same time during early voting or on Election Day. Simply go to your regular polling place or early voting site to register and vote. You will need to show proof of residence and a photo ID. Contact your Local Election Office if you have any questions.
To register in Idaho you must:
be at least 18 years old
be a citizen of the United States
have resided in Idaho and in the county for 30 days prior to the day of election
not be serving a sentence of imprisonment for a felony. Your voting rights are restored once you have completed your sentence, probation, and parole.
Local Election Office: This is the government office responsible for running elections in your region. Theses are the best people to contact if you have any questions at all about voting in your state.